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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36269 results found.

  1. GRB 120711A: Fermi LAT detection
  2. GRB 120711A: MASTER early OT detection
  3. GRB 120711A: Swift-XRT observations
  4. GRB 120711A Gemini-S likely redshift
  5. Konus-Wind observation of GRB 120709A
  6. GRB 120711A: REM NIR early time detection
  7. GRB 120711A: GROND photometric redshift
  8. GRB 120711A: Fermi GBM observation
  9. GRB 120711A: MAXI/GSC detection
  10. GRB 120711A: a possible X-ray transient
  11. GRB 120711A: an bright long GRB detected with INTEGRAL
  12. Continued Skynet/PROMPT observations of GRB120711A
  13. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  14. Swift detection of GRB 120711B or a new Galactic transient
  15. GRB 120709A: Fermi GBM detection
  16. GRB 120709A: Swift-XRT observations
  17. GRB 120709A: Matched filter analysis of Fermi-LAT data
  18. GRB 120709A: optical afterglow limits
  19. Konus-Wind observation of GRB 120707A
  20. IPN Triangulation of GRB 120707A
  21. GRB 120709A: Fermi-LAT Detection
  22. GRB 120707A: Fermi GBM Detection of a Bright Burst
  23. GRB 120624B: mm detection at PdBI
  24. GRB 120703A: SMARTS optical/IR observations
  25. GRB 120703A: Swift/UVOT Detection
  26. GRB 120703A: Fermi GBM detection
  27. GRB 120703A: Swift-XRT refined Analysis
  28. GRB 120703A: Enhanced Swift-XRT position
  29. GRB 120703A: Swift-BAT refined analysis
  30. GRB 120624B Suzaku WAM observation of the prompt emission
  31. Konus-Wind observation of GRB 120703A
  32. GRB 120703A: NOT optical observation
  33. GRB 120701A: Swift/UVOT Detection
  34. GRB 120701A: GROND detection of the afterglow
  35. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  36. GRB 120701A: Swift-XRT afterglow detection and analysis
  37. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  38. GRB 120701A: Swift-BAT refined analysis
  39. GRB 120630A: NOT optical source within the XRT error circle
  40. Swift Trigger 525554 is probably not a GRB
  41. GRB120624B: Chandra observations and afterglow detection
  42. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  43. GRB 120624B Further Swift-XRT analysis
  44. GRB 120624B: Swift/UVOT Upper Limits
  45. GRB 120624B: Further analysis of the HAWKI observations
  46. GRB 120624B: Swift-XRT observations
  47. GRB 120624B: GROND upper limits
  48. GRB 120624B: NIR counterpart candidate from HAWKI
  49. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  50. GRB 120624B: NOT optical upper limit
  51. GRB 120624B: optical observations
  52. GRB 120624B, Swift-BAT refined analysis
  53. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  54. Konus-Wind observation of GRB 120624B
  55. GRB 120624B: Swift detection of a burst
  56. GRB 120624A: Fermi GBM observation
  57. GRB 120624B: Fermi-LAT Detection
  58. Konus-Wind observation of GRB 120624A
  59. GRB 120624B: Fermi GBM detection
  60. IPN Triangulation of GRB 120624A (short/intense)
  61. GRB 120622A: MAXI/GSC detection
  62. Swift trigger 524642 / SwJ1910.2-0546
  63. GRB 120602A: Suzaku WAM observation of the prompt emission
  64. Konus-Wind observation of GRB 120617A
  65. IPN Triangulation of GRB 120617A (short/intense)
  66. Konus-Wind observation of GRB 120602A
  67. IPN Triangulation of GRB 120602A (long/very bright)
  68. GRB 120614A: MAXI/GSC detection of a burst
  69. GRB 120612A: optical observations
  70. GRB 120612A: Swift/UVOT observations
  71. GRB 120612A: Swift-XRT refined Analysis
  72. GRB 120612A: Swift-BAT refined analysis
  73. GRB 120612A: Enhanced Swift-XRT position
  74. GRB 120612A: BOOTES-3 optical upper limit
  75. GRB 120612A: Swift detection of a burst
  76. GRB 120603A: Suzaku WAM observation of the prompt emission
  77. Konus-Wind observation of GRB 120603A
  78. IPN Triangulation of short GRB 120603A
  79. Fermi GBM trigger 120602.539 is not a GRB
  80. Konus-Wind observation of GRB 120528B
  81. GRB 120519A: Suzaku WAM observation of the prompt emission
  82. GRB 120528C: MAXI/GSC detection
  83. GRB 120521C redshift estimate
  84. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  85. GRB 120528B: MAXI/GSC detection
  86. GRB 120512A: Suzaku WAM observation of the prompt emission
  87. GRB 120521C: EVLA Localization of Afterglow
  88. GRB 120521C: EVLA 22 GHz Detection
  89. GRB120521B: SSO 2.3m upper limits
  90. Konus-Wind observation of GRB 120522A
  91. IPN triangulation of GRB 120522A (long/intense)
  92. GRB 120521B: Fermi GBM observation
  93. GRB 120521A: ATCA 34GHz upper limit
  94. GRB 120521C: Early Tautenburg limits
  95. GRB 120521C: EVLA 22 GHz Upper Limit
  96. GRB 120521A: GROND Upper limits
  97. GRB 120521C: Swift-XRT refined Analysis
  98. GRB 120521C: Swift-BAT refined analysis
  99. GRB 120521C: Keck Observations
  100. GRB 120521C: Swift/UVOT Upper Limits

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